Move QMacStyle icon handling down to the common style.

This is more follow the cue of what is done on X11, mainly, if you are
creating things like messageboxes or file views, you want them to follow
the desktop (yes, you do). If you disable desktop settings aware, you
get the old look. This also meant shifting around some functions into
qt_cocoa_helpers_mac to make them more readily available instead of
living in differnt files. People who use standard pixmap get the old
values, but I think that's fine. If you haven't moved onto standardIcon
(introduced in 4.1), you don't get the latest bling.

Review-by: Jens Bache-Wiig

2 files changed, 49 insertions, 0 deletions

diff --git a/src/gui/kernel/qt_cocoa_helpers_mac.mm b/src/gui/kernel/qt_cocoa_helpers_mac.mm
index a98a7f8..223e36b 100644
--- a/src/gui/kernel/qt_cocoa_helpers_mac.mm
+++ b/src/gui/kernel/qt_cocoa_helpers_mac.mm
@@ -77,6 +77,7 @@
 #include <qwidget.h>
 #include <qdesktopwidget.h>
 #include <qevent.h>
+#include <qpixmapcache.h>
 #include <private/qevent_p.h>
 #include <private/qt_cocoa_helpers_mac_p.h>
 #include <private/qt_mac_p.h>
@@ -1147,4 +1148,49 @@ QString qt_mac_get_pasteboardString()
     }
 }
 
+QPixmap qt_mac_convert_iconref(const IconRef icon, int width, int height)
+{
+    QPixmap ret(width, height);
+    ret.fill(QColor(0, 0, 0, 0));
+
+    CGRect rect = CGRectMake(0, 0, width, height);
+
+    CGContextRef ctx = qt_mac_cg_context(&ret);
+    CGAffineTransform old_xform = CGContextGetCTM(ctx);
+    CGContextConcatCTM(ctx, CGAffineTransformInvert(old_xform));
+    CGContextConcatCTM(ctx, CGAffineTransformIdentity);
+
+    ::RGBColor b;
+    b.blue = b.green = b.red = 255*255;
+    PlotIconRefInContext(ctx, &rect, kAlignNone, kTransformNone, &b, kPlotIconRefNormalFlags, icon);
+    CGContextRelease(ctx);
+    return ret;
+}
+
+void qt_mac_constructQIconFromIconRef(const IconRef icon, const IconRef overlayIcon, QIcon *retIcon, QStyle::StandardPixmap standardIcon)
+{
+    int size = 16;
+    while (size <= 128) {
+
+        const QString cacheKey = QLatin1String("qt_mac_constructQIconFromIconRef") + QString::number(standardIcon) + QString::number(size);
+        QPixmap mainIcon;
+        if (standardIcon >= QStyle::SP_CustomBase) {
+            mainIcon = qt_mac_convert_iconref(icon, size, size);
+        } else if (QPixmapCache::find(cacheKey, mainIcon) == false) {
+            mainIcon = qt_mac_convert_iconref(icon, size, size);
+            QPixmapCache::insert(cacheKey, mainIcon);
+        }
+
+        if (overlayIcon) {
+            int littleSize = size / 2;
+            QPixmap overlayPix = qt_mac_convert_iconref(overlayIcon, littleSize, littleSize);
+            QPainter painter(&mainIcon);
+            painter.drawPixmap(size - littleSize, size - littleSize, overlayPix);
+        }
+
+        retIcon->addPixmap(mainIcon);
+        size += size;  // 16 -> 32 -> 64 -> 128
+    }
+}
+
 QT_END_NAMESPACE
diff --git a/src/gui/kernel/qt_cocoa_helpers_mac_p.h b/src/gui/kernel/qt_cocoa_helpers_mac_p.h
index 5f6204f..99f058b 100644
--- a/src/gui/kernel/qt_cocoa_helpers_mac_p.h
+++ b/src/gui/kernel/qt_cocoa_helpers_mac_p.h
@@ -143,6 +143,9 @@ struct ::TabletProximityRec;
 void qt_dispatchTabletProximityEvent(const ::TabletProximityRec &proxRec);
 Qt::KeyboardModifiers qt_cocoaModifiers2QtModifiers(ulong modifierFlags);
 Qt::KeyboardModifiers qt_cocoaDragOperation2QtModifiers(uint dragOperations);
+QPixmap qt_mac_convert_iconref(const IconRef icon, int width, int height);
+void qt_mac_constructQIconFromIconRef(const IconRef icon, const IconRef overlayIcon, QIcon *retIcon,
+                                      QStyle::StandardPixmap standardIcon = QStyle::SP_CustomBase);
 inline int flipYCoordinate(int y)
 {
     return QApplication::desktop()->screenGeometry(0).height() - y;